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Ryobi 18V Battery Not Charging? – Here’s How to Fix

Ryobi batteries are great for all the home handymen out there! They give excellent value, have a wide range, and their quality is impressive. But it’s not rare to come across a Ryobi battery that fails to charge. 

When you have spent so much money and effort finding a good battery, it can get frustrating when such situations occur. But what’s even more frustrating? Not knowing what to do about them!

Hence, here is all you should know about why your Ryobi 18 Volts battery is not charging and how you can fix it. Also, a few tips for maintaining your battery to ensure such an incident does not occur at the end! 

Why Ryobi 18V battery won’t hold charge 

There’s a long list of reasons why your battery might suddenly stop charging. From faulty hardware to a lousy environment, anything can cause inconvenience. The following four are the most common and probable reasons. Identify which of these is the problem and apply a solution accordingly: 

The battery cells are out of balance

Ryobi 18 volt battery packs consist of multiple individual cells. In such designs, the systems are aligned to balance the cell voltages. The result is that it ensures an optimized life cycle and better performance. 

Understanding this concept, it is not unusual for one or several cells in a battery to go out of balance. The reason could be one of many, but if you don’t have proper knowledge and experience, it might be hard for you to diagnose the exact problem. 

How to fix this 

Check if your warranty still applies to the battery pack. If it does, the rest is easy! Simply take your battery for replacement or repair. If you don’t have an applicable warranty for the product, you have to rebalance the battery yourself. Here’s how: 

  • Locate four security screws at the bottom and the t10 screw at the top. Remove all of them.
  • Remove the top cover by levering the clips until the base pops out. 
  • Try levering the terminal assembly downwards inside the top cover. 
  • Once you see an adequate amount of space, try holding the terminal assembly and slide off the cover. 
  • Start measuring the cell balance; if they’re somewhere around 3.0 Volts to 4.2 Volts, great! However, all the cells should show approximately the same readings. If there is a difference of over 0.1 volts, this imbalance can be a problem. 
  • Connect a power supply to a cell being rebalanced: attach negative to the negative and positive to the positive. You will witness the current going down. When it becomes almost zero, the cell has fully charged. 
  • You can now remove your power supply and retake the measurements. 
  • Keep repeating the procedure until there is no more imbalance. 

The battery is dead 

If you have a bad, faulty, or dead battery, it won’t work, and that’s the basic rule for pretty much any battery out there. But the interesting part about the Ryobi 18 volt battery pack is that it consists of multiple small batteries. And they are all attached in a series pattern. This connection style means that if one tiny cell goes bad or dies, it makes the entire pack pretty much unusable. Hence, you must determine whether your battery is entirely dead or if a tiny part of it is creating the problem. How can you do that? Here’s how: 

  • Recharge your battery for about an hour. 
  • Connect your multimeter to the battery’s terminals.
  • Measure and record the voltage readings. 
  • If it’s higher than the rating on the side, good! If it’s lower than that, you need to replace it. 

How to fix this 

The good part about this series attachment is that if a tiny cell is the causative agent, you have many ways to revive your battery by fixing the underlying issue. Here are some things you can do to solve the problem: 

  • Try jump-starting your battery. Just like any other battery, even these can be jump-started very quickly! 
  • Here’s another solution for those of you who want to go an extra mile and put more effort into diagnosing the problem: test every cell in the battery to identify the faulty one and then replace it. It does take a lot more time and is slightly more complicated. However, it is the most effective solution. If you apply this technique, you can figure out the actual problem and cut off the issue from its very root! There’s a high chance you won’t be facing this problem for a while after that! 

Terminal problem and loose connections

Terminal problems are another prevalent reason your battery may not be charging. Whenever you sense something wrong, take a quick look at the contacts on your charger and battery. Do you notice rust, gunk, or accumulated dirt? If yes, there is a high chance that no charge can pass through that! 

Similarly, loose connections also mean that no charge is passing through and can be a significant reason why your Ryobi 18 volt battery is not charging. Again, there are several possibilities, like: 

  • You might have bent, flawed, or damaged battery contacts where you plug the pack into the charger. 
  • If there’s a loose connection inside the battery pack among the individual batteries, it can also cause problems. 
  • If you don’t have a proper connection, you will probably see a red charger light flashing. Once the battery inserts appropriately, you will hear a clicking sound. 

How to fix this 

  • If you notice dirty contacts, you can clean them using wipes soaked in alcohol or a wire brush. Just make sure they get enough time to dry before you recharge them. 
  • Old sandpaper will be a great hack if you notice the contacts are rusty. Scrub them down nicely but don’t apply too much pressure, or you might end up damaging the contacts. 
  • If you notice bent battery pack connectors, use pliers to bend them back into shape. 
  • Ensure that your battery is firmly and correctly inserted into its charging unit. If you didn’t hear the clicking sound before, make sure you hear it now. 

It’s too cold or too hot 

Of all the possible reasons why your battery is not charging, the environment does not occur to most people. Many ignore it since it’s not that popular of a problem. However, you’ll be surprised to learn just how impactful the surroundings of a battery are, particularly the temperature. 

Pay attention to the room temperature where you store your battery most of the time. If it’s too hot or too cold, it might affect the performance and functioning of the battery. After that, check the charging temperature of your Ryobi 18 volt battery pack. Most lithium-ion batteries are constructed to be charged around 41 degrees Fahrenheit to 113 degrees Fahrenheit. It can be a problem if the temperature fluctuates way below or above this range. 

How to fix this 

  • Keep track of the room temperature where you keep your battery. Maintain the temperature at all times and make sure it does not fluctuate too much. 
  • If you notice that the temperature keeps changing, immediately change the location of your battery for good. Doing so avoids possible problems in the future and helps you prevent problems. 
  • Keep track of the charging temperature of your battery. Make sure that it and the charging unit are at room temperature. If you notice that the battery is too hot or cold, let it return to room temperature and then try again. 

Tips for maintaining your Ryobi Batteries

Apart from all the possible reasons why your battery is not charging and fixing those particular issues, there are other ways to maintain the battery correctly and ensure that such occurrences never show up. Besides, better safe than sorry, right? 

Try the following ways to ensure proper performance and a longer lifespan for your Ryobi 18 volt battery pack: 

  • Keep the battery in a room where the temperature stays around 50 to 100 degrees Fahrenheit. 
  • Ensure that the storage area is also dry and does not have exposure to humidity. 
  • Check your batteries regularly. Make sure they’re in good shape, and no dirt, gunk, or rust is gathering anywhere. 
  • If you’re not using the battery, recharge it every three to six weeks. It helps maintain their shape and condition. 
  • Once the battery is done charging, remove it from the charger. Overcharging is quite dangerous to your battery’s health. 
  • Batteries tend to get hot when you’re using them. Experts recommend giving them time to cool down before you charge them. 

Remember, all these tips will not guarantee that you’ll never have problems with your Ryobi 18 volt battery. However, they will ensure that it stays in good shape, gives better performance, and you don’t have to replace or repair it frequently. 

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